<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag  closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                    <!-- 通过for循环嵌套渲染二级权限-->
                    <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                        <el-col :span="6">
                            <el-tag type="success"  closable
                             @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <el-col :span="18">
                            <el-tag type="warning" v-for="(item3) in item2.children" 
                            :key="item3.id" closable
                            @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>             
                        </el-col>
                    </el-row>
                    </el-col>
                </el-row>
            </template>
        </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini"
                    @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini"
                     @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button type="warning" icon="el-icon-setting" size="mini"
                    @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
       </el-table>
    </el-card>


    <!-- 添加角色对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClose">
            <!-- 内容主体区 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc" type="password"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
        title="修改角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClose">
        <!-- 内容主体区 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="editForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightsList" :props="treeProps" 
        
        show-checkbox node-key="id"
        default-expand-all="true"
        :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
    </el-dialog>

  </div>
</template>

<script>
    export default {
        data(){
            return{
                // 角色列表数据
                rolesList:[],
                // 控制添加对话框的显示与隐藏
                addDialogVisible:false,
                // 添加角色的表单数据
                addForm:{
                    roleName:'',
                    roleDesc:''
                },
                // 添加表单的验证规则对象
                addFormRules:{
                    username:[
                        { required: true, message: '请输入角色名称', trigger: 'blur' },
                        { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                    password:[
                        { required: true, message: '请输入角色描述', trigger: 'blur' },
                        { min: 6, max: 30, message: '长度在 6 到 30 个字符', trigger: 'blur' }
                    ],
                },
                // 控制修改角色对话框的显示与隐藏
                editDialogVisible:false,
                // 查询到的角色信息对象
                editForm:{},
                // 修改表单的验证规则对象
                editFormRules:{
                   username:[
                        { required: true, message: '请输入角色名称', trigger: 'blur' },
                        { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                    password:[
                        { required: true, message: '请输入角色描述', trigger: 'blur' },
                        { min: 6, max: 30, message: '长度在 6 到 30 个字符', trigger: 'blur' }
                    ],
                },
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible:false,
                // 所有权限列表数据 默认为空
                rightsList:[],
                // 定义树形控件中的绑定对象
                treeProps:{
                    label:'authName',
                    children:'children'
                },
                // 默认选中的节点id
                defKeys:[],
                // 当前即将分配权限的id
                roleId:''
            }
        },
        created(){
            this.getRolesList()
        },
        methods:{
            // 获取角色列表
            async getRolesList(){
                const {data:res} = await this.$http.get('roles')
                if(res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
                this.rolesList = res.data
                // console.log(res.data);
            },
            // 监听添加角色对话框的关闭事件
            addDialogClose(){
                this.$refs.addFormRef.resetFields()
            },
            // 点击添加新角色
            addRole(){
                this.$refs.addFormRef.validate(async valid => {
                    if(!valid) return
                    // 可以发起添加角色的网络请求
                    const {data:res} = await this.$http.post('roles',this.addForm);
                    if(res.meta.status !== 201) return this.$message.error("添加角色失败！");
                    this.$message.success("添加角色成功");
                    // 隐藏添加角色的对话框
                    this.addDialogVisible = false
                    this.getRolesList()
                })
            },
            // 展示编辑角色的对话框
            async showEditDialog(id){
                  const {data:res} = await this.$http.get('roles/' + id);
                  if(res.meta.status !== 200) return this.$message.error("查询角色失败！");
                  this.editForm = res.data
                this.editDialogVisible = true
                
            },
             // 监听修改角色对话框的关闭事件
            editDialogClose(){
                 this.$refs.editFormRef.resetFields()
            },
            // 点击修改角色信息
            editRole(){
                this.$refs.editFormRef.validate(async valid => {
                    if(!valid) return
                    // 可以发起修改角色的网络请求
                    const {data:res} = await this.$http.put('roles/' + this.editForm.roleId,{
                        roleName:this.editForm.roleName,
                        roleDesc:this.editForm.roleDesc
                    });
                    if(res.meta.status !== 200) return this.$message.error("更新角色信息失败！");
                    // 关闭对话框
                    this.editDialogVisible = false
                    // 更新数据列表
                    this.getRolesList()
                    // 提示修改成功
                    this.$message.success("更新角色信息成功");
                })
            }, 
            // 根据id删除角色
            async removeRoleById(id){
                // 弹窗提示
                const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

                // 角色确认删除 返回confirm字符串
                // 角色取消删除 返回cancel字符串
                if(confirmResult !== 'confirm') return this.$message.info('已取消删除')
                const {data:res} = await this.$http.delete('roles/' + id)
                if(res.meta.status !== 200) return this.$message.error("删除角色失败")
                // 更新数据列表
                this.getRolesList()
                // 提示删除成功
                this.$message.success("删除角色成功");
            },
            // 根据id删除对应权限
            async removeRightById(role,rightId){
                const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

                if(confirmResult !== 'confirm') return this.$message.info('取消删除')
                const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if(res.meta.status !== 200) return this.$message.error("删除权限失败")
                // 不建议调用数据列表 会重新渲染页面 点击删除合并
                // this.getRolesList()
                // 因为返回的data, 是当前角色下最新的权限数据 所以直接给当前角色赋值权限
                role.children = res.data
                
            },
            // 展示分配权限
            async showSetRightDialog(role){   
                this.roleId = role.id    
                // 获取全部权限列表
                const {data:res} = await this.$http.get('rights/tree');
                if(res.meta.status !== 200) return this.$message.error("获取权限失败！");
                // 把获取的数据保存到data中
                this.rightsList = res.data
                // 递归获取三级节点的id
                this.getLeafKeys(role, this.defKeys)
                this.setRightDialogVisible = true
            },
            // 通过递归的形式，获取角色下所有权限的id并保存到defKeys数组中
            getLeafKeys(node,arr){
                // 如果当前node节点不包含children就是三级节点
                if(!node.children){
                    return arr.push(node.id)
                }
                node.children.forEach(item => {
                    this.getLeafKeys(item,arr)
                });

            },
            // 监听分配权限对话框的关闭事件
            setRightDialogClosed(){
                this.defKeys = []
            },
            // 点击为角色分配权限
            async allotRights(){
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')
                const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

                if(res.meta.status !== 200) return this.$message.error('分配权限失败！')

                this.$message.success('分配权限成功')
                this.getRolesList()
                this.setRightDialogVisible = false
            }

        }
    }
</script>

<style>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>